Go to control panel -> system -> device manager tab -> click display adapters -> you should see what you have, try clicking it and picking properties for more info.
Here's something else you can try. Right click the desktop. This should pop up a box with a properties at the bottom. Pick properties, settings tab, advanced button, adapter tab. This should give you some info.
You may also get some information through system information. Click start, go to accessories, system tools, system information (this is for win98, and isn't always installed) You can find out just about anything using this program.
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bloom25
THUNDERBIRDS